Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterFast, Reliable Duct Sealing Across Bellaire
Duct sealing in Bellaire typically runs $450 – $1,200 for a whole-home system, and most jobs are scheduled within two business days after your call. We’re the Bellaire crew homeowners call when flex duct in a hot attic has pulled loose, when a point-of-sale inspection flagged leaks, or when flood water got into the crawlspace and nobody’s sure if the ducts can be saved.
Our dispatch team coordinates from the Houston office, but our technicians live in and around the Bellaire area and offer Bellaire Dryer Vent Cleaning. We know the 1950s ranch homes off Cedar Street and the newer infill near Bellaire Boulevard. We know those original flex-duct attics hit 140 degrees in August, and we know the city’s inspection requirements can turn a failed duct test into a closing deadline. When you call (361) 326-5060, a live person answers, 24 hours a day. We’ll give you a written price before any work starts, and every repair is covered by our 365-Day Done Right Promise.
Why Hollis Air Duct Cleaning Is Bellaire’s Preferred Duct Sealing Company
We’ve worked Bellaire homes since long before the latest round of post-Harvey rebuilds, and our reputation here is built on showing up when we said we would and leaving the site clean. Our technicians are background-checked, uniformed, and expected to work by The Garrison Code: arrive inside the quoted window, price in writing, complete the job by the book.
Homeowners in Bellaire’s 77401 ZIP code call us back because we document our work. After a flood or heavy rain, we run camera inspection through every supply and return line, take moisture readings, and build a report that satisfies both insurers and the city’s point-of-sale inspectors. No verbal promises. No paperwork that disappears.
Our phones are answered by a live person 24/7. No voicemail loops, no callback queues, no waiting until Monday when your closing is Friday.
We’re part of the Garrison Partners family, independently owned and operated, and we’ve been in business since 2004. That track record predates most local competitors, and our 365-Day Done Right Promise means if the seal fails within a year, we return and make it right at no charge, including a free second visit.
Duct Insulation in Bellaire
Duct Insulation in Bellaire addresses the heat gain that ruins efficiency in those original 1950s-60s ranch attics, where flex duct runs through spaces that hit 140 degrees for months at a stretch. The job involves wrapping or replacing degraded insulation around existing ductwork, sealing any exposed joints first, and verifying that the R-value meets current standards for our climate zone. Most Bellaire homeowners need this when their attic insulation has compressed, gotten wet, or simply aged out after forty years in that heat. A typical Duct Insulation job in Bellaire runs $600 – $1,500 depending on linear footage and accessibility.
When Insulation Needs Replacement First
We see this constantly in Bellaire’s post-flood rebuilds: the flex duct itself is structurally sound, but the fiberglass insulation around it sat in flood water for days. We strip the wet material, dry the duct with forced air and dehumidification, then re-insulate with new wrap before sealing. Skip the drying step and you’re trapping moisture against metal that will corrode.
R-Value Requirements for Gulf Coast Attics
Bellaire’s 8-9 month cooling season demands R-6 or R-8 insulation on flex duct in unconditioned attics. Many original homes have R-4 or no insulation at all on retrofitted sections. We specify the upgrade in our written quote, not as an add-on at the door.
HVAC Duct Sealing in Bellaire
HVAC Duct Sealing in Bellaire fixes the leaks that pull 140-degree attic air into your supply system, or dump conditioned air into wall cavities where it does no good. The job involves pressurizing the duct system to locate leaks, then sealing joints, boots, and connections with mastic and mesh (not tape alone, which peels in our humidity). We finish with a negative pressure test to verify the seal. A typical HVAC Duct Sealing job in Bellaire runs $450 – $1,200 for a whole-home system, with larger homes or complex attic layouts toward the higher end.
Mastic vs. Tape in Humid Attics
We only use mastic and fiberglass mesh on Bellaire duct board. Tape adhesives degrade in our attic condensation, often within a single cooling season. Mastic remains flexible and airtight for years. It’s slower to apply. It costs more in labor. It actually works.
Post-Flood Sealing Protocol
After water intrusion, we camera-inspect every line before sealing. If the duct board is swollen, delaminated, or still damp, we document it and recommend replacement. Sealing over damaged ductwork hides the problem and guarantees a callback, or worse, a failed city inspection at closing.
Trusted Brands We Service in Bellaire
Our Duct Sealing crews carry professional-grade equipment from Rotobrush and Abatement Technologies, and we stock filtration and sealing products from Aprilaire and Guardsman for Bellaire customers who need fast turnaround. Rotobrush rotary brush systems agitate debris loose from duct walls before we seal, so the new seal isn’t trapping contaminants. Abatement Technologies negative-air machines maintain containment during post-flood work, protecting the rest of your home from disturbed mold spores. We don’t show up with hardware-store tape and hope for the best. We bring the same tools commercial crews use on medical and institutional jobs, sized right for your residential system.
Common Duct Sealing Problems We See in Bellaire Homes
- Flood-damaged flex duct that looks dry but isn’t. After Hurricane Harvey and the heavy rain events since, we’ve found flex duct in Bellaire crawlspaces that passed a surface touch-test but still held moisture at the core. Sealing it traps that moisture, and mold blooms within one cooling season. We probe with moisture meters at multiple points before sealing.
- Tape-only repairs on original 1950s duct board. The older ranch homes near Evergreen and Fifth Street often have duct board that’s been patched with foil tape three or four times. In Bellaire’s humidity, those patches peel, leak, and get patched again. We strip the tape, clean the surface, and apply mastic and mesh for a permanent seal.
- Sealed joints hiding post-flood debris. Some crews seal without camera inspection, leaving mud, insulation fragments, and flood sediment in the supply lines. The homeowner gets a “sealed” system that still blows particulates. We run cameras before and after every post-flood job, and we show you the footage.
- Failed point-of-sale inspections due to undocumented work. Bellaire’s inspection program requires proof that duct sealing was done to code. We provide written test results, photos, and moisture readings in a format that satisfies the city and keeps your closing on track.
Pricing for Duct Sealing in Bellaire, TX
Whole-home duct sealing in Bellaire typically costs $450 – $1,200. Duct insulation runs $600 – $1,500. What moves you within that range: linear footage of ductwork, attic accessibility (those low 1950s ranch attics with single access points take longer), whether we need to remove degraded insulation first, and whether post-flood drying and camera inspection are required before sealing.
We do not quote per-vent prices. We do not offer teaser coupons that balloon once the technician arrives. We give one flat price per system, agreed in writing before any work starts. That price does not move at the door. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Bellaire
Our crews work throughout the southwest Houston metro, including Duct Sealing in Bellaire and surrounding Stafford, Missouri City, Sugar Land, and Houston neighborhoods. Each job carries the same written price guarantee and 365-Day Done Right Promise, whether we’re sealing ductwork in a Bellaire ranch or a Sugar Land two-story.
Serving Bellaire, TX - Our Local Coverage Area
We’re based in the Bellaire area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Duct Sealing in Bellaire
We camera-inspect every line and take moisture readings at multiple points; if the duct board is swollen, delaminated, or still damp, we document it and recommend replacement rather than sealing. Sealing over wet or damaged ductwork traps moisture and guarantees mold growth. Call (361) 326-5060 for an inspection and written recommendation – estimates are free.
Yes, Bellaire’s point-of-sale inspection program can require duct cleaning or repair as a condition of sale, and a failed duct test will delay closing until it’s resolved. Neighboring Houston neighborhoods without that ordinance rarely see duct sealing tied to a real estate deadline. We provide documentation that satisfies both the city inspector and the buyer’s lender. Call (361) 326-5060 if your closing is approaching.
We build a packet with pre-work camera footage, moisture readings, photos of the sealing process, post-work negative pressure test results, and a written statement that the duct board was structurally sound before sealing. Insurers reject claims when documentation is missing or when air handlers were submerged and not flagged. We flag everything, good and bad. Call (361) 326-5060 to discuss your specific situation.
Tape-only repairs peel in our 8-9 month cooling season and high attic condensation, and sealing over wet or debris-filled ducts traps problems that destroy the seal from inside. We use mastic and mesh, verify dryness with meters, and run negative pressure tests to confirm the seal before we leave. Call (361) 326-5060 for a permanent fix.
Duct sealing fixes leaks in the duct itself, the joints and connections where conditioned air escapes or unconditioned attic air enters; duct insulation wraps the sealed duct to prevent heat gain through the duct wall. In Bellaire’s 140-degree attics, you need both: a leaky insulated duct still wastes energy, and a sealed uninsulated duct still cooks your supply air. We assess which you need, or whether both are required, and put it in writing before starting. Call (361) 326-5060 for a free evaluation.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Bellaire since 2004 as part of the Garrison Partners family.